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A kind of isomerization catalyst preparation method with MFI structure molecular sieve as carrier

A molecular sieve and catalyst technology, applied in the field of isomerization catalyst preparation, can solve problems such as difficulty in controlling the loading position of metal components, achieve high activity and isomer yield, high micropore volume and acid content, and reduce damage Effect

Active Publication Date: 2021-10-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current conventional preparation methods are difficult to control the loading position of metal components.

Method used

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  • A kind of isomerization catalyst preparation method with MFI structure molecular sieve as carrier
  • A kind of isomerization catalyst preparation method with MFI structure molecular sieve as carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 20g of the same ZSM-5 molecular sieve powder as the comparative example (template content is 17.3wt.% of the molecular sieve weight) is placed in a quartz tube, and in an air atmosphere, the temperature is raised to 150°C at 5°C / min, at this temperature Calcined for 4 hours, then naturally cooled to room temperature to obtain the treated ZSM-5 molecular sieve carrier, the content of carbon deposits and organic matter in the molecular sieve carrier was 15.8wt.%. With 5.0mL containing Pt 0.001g / mL of H 2 PtCl 6 The solution impregnates 5 g of the above-mentioned molecular sieve carrier. The impregnated sample was dried at 120°C for 2h, and then reduced in a hydrogen atmosphere at 300°C for 4h to obtain a 0.5wt.% Pt / ZSM-5 catalyst. The content of carbon deposition and organic matter in the catalyst is 0, the acid content is 1.65mmol / g, and the micropore volume is 0.141cm 3 / g. See Table 1 for the characterization results of carbon deposition and organic content in the ...

Embodiment 2

[0043] The former powder of Cr-ZSM-5 molecular sieve that 20g contains template (template content is 17.8wt.% of molecular sieve weight, and the content of Cr is 0.9wt.%) is placed in quartz tube, in air atmosphere, 5 ℃ / The temperature was raised to 230° C. at this temperature for 12 hours, and then naturally cooled to room temperature to obtain the treated Cr-ZSM-5 molecular sieve carrier. The content of carbon deposits and organic matter in the molecular sieve carrier was 14.0wt.%. With 5.0mL containing Pt 0.001g / mL of H 2 PtCl 6 The solution impregnates 5 g of the above-mentioned molecular sieve carrier. The impregnated sample was dried at 120°C for 2h, and then reduced in a hydrogen atmosphere at 400°C for 6h to obtain a 0.5wt.% Pt / Cr-ZSM-5 catalyst. The content of carbon deposition and organic matter in the catalyst is 0, the acid content is 1.54mmol / g, and the micropore volume is 0.136cm 3 / g. See Table 1 for the characterization results of carbon deposition and org...

Embodiment 3

[0045] 20g of Co-ZSM-5 molecular sieve powder containing template (template content is 17.5wt.% of molecular sieve weight, Co content is 1.2wt.%) is placed in quartz tube, in air atmosphere, 5 ℃ / Min was raised to 300°C, calcined at this temperature for 2 hours, and then naturally cooled to room temperature to obtain the treated Co-ZSM-5 molecular sieve carrier, the content of carbon deposits and organic matter in the molecular sieve carrier was 10.9wt.%. With 5.0mL containing Pt 0.001g / mL of H 2 PtCl 6 The solution impregnates 5 g of the above-mentioned molecular sieve carrier. The impregnated sample was dried at 120°C for 2h, and then reduced at 400°C for 6h in a hydrogen atmosphere to obtain a 0.5wt.% Pt / Co-ZSM-5 catalyst. The content of carbon deposition and organic matter in the catalyst is 0, the acid content is 1.37mmol / g, and the micropore volume is 0.123cm 3 / g. See Table 1 for the characterization results of carbon deposition and organic content in the molecular ...

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Abstract

The invention discloses a preparation method of an isomerization catalyst with an MFI structure molecular sieve as a carrier. The specific steps of catalyst preparation are as follows: first, the molecular sieve raw powder with MFI structure is partially demoulded at 100-400°C; then the Group VIII noble metal active components are loaded on the treated molecular sieve; Reduction to obtain the target catalyst. By controlling the removal method of the template agent in the molecular sieve carrier, the metal properties, acid properties and pore properties of the catalyst can be effectively regulated. Compared with the catalyst prepared in the prior art, the catalyst prepared by the method of the invention shows high reactivity and isomer yield in the normal paraffin isomerization reaction.

Description

technical field [0001] The invention belongs to the fields of petrochemical industry, fine chemical industry and molecular sieve catalysts, and in particular relates to a preparation method and application of an isomerization catalyst with an MFI structure molecular sieve as a carrier. [0002] technical background [0003] The isomerization reaction of alkanes plays a very important role in the process of improving the quality of oil products. The hydroisomerization of light alkanes can produce high-octane gasoline blending components, while the hydroisomerization of long-chain alkanes is mainly used to improve the low temperature flow properties of jet fuel, diesel oil and lubricating oil. At present, the most advanced catalysts used in this reaction are bifunctional catalysts in which molecular sieves are used as supports to support metal components with hydrogen addition (de)hydrogenation properties. US4710485, 5135638, 5282598, CN1792451, 1788844, 101245260 and other pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/44B01J29/46B01J29/48C10G45/64
CPCB01J29/44B01J29/46B01J29/48B01J2229/18C10G45/64
Inventor 田志坚吕广王从新刘浩潘振栋李鹏
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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